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                            data-longname="module:ol/format/Polyline" data-name="ol/format/polyline">
                            <span class="title toggle">
                                <span class="fa fa-plus me-2 mt-1"></span>
                                <span><a href="module-ol_format_Polyline.html">ol​/format​/Polyline</a></span>
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                                <span class="subtitle">Typedefs</span>
                                <ul>
                                    <li data-name="options"><a
                                            href="module-ol_format_Polyline.html#~Options">Options</a>
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                                <span class="subtitle">Methods</span>
                                <ul>
                                    <li data-name="decodedeltas"><a
                                            href="module-ol_format_Polyline.html#.decodeDeltas">decodeDeltas</a>
                                    <li data-name="decodefloats"><a
                                            href="module-ol_format_Polyline.html#.decodeFloats">decodeFloats</a>
                                    <li data-name="encodedeltas"><a
                                            href="module-ol_format_Polyline.html#.encodeDeltas">encodeDeltas</a>
                                    <li data-name="encodefloats"><a
                                            href="module-ol_format_Polyline.html#.encodeFloats">encodeFloats</a>
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                <h1 class="page-title" data-filename="module-ol_format_Polyline.html">Module: ol/format/Polyline</h1>
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                <section class="content">

                    <header>
                        <h2 class="my-3">ol/format/Polyline
                        </h2>
                        <br>




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                            <dl class="details">





















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                        </div>










                        <h3 class="subsection-title">Classes</h3>

                        <dl>
                            <dt><a href="module-ol_format_Polyline-Polyline.html">Polyline</a></dt>
                            <dd></dd>
                        </dl>









                        <h3 class="subsection-title">Functions</h3>

                        <dl>


                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".decodeDeltas">
                                    </div>
                                    <h4 class="name">
                                        decodeDeltas<span class="signature">(encoded, stride, <span
                                                class="optional">factor</span>)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{Array.&lt;number>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/format/Polyline.js">format/Polyline.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/format/Polyline.js#L199">line
                                            199</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {decodeDeltas} from 'ol/format/Polyline';</code></pre>



                                <div class="description">
                                    <p>从编码字符串中解码一个n维点列表</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>encoded</code></td>



                                            <td class="type">


                                                <span class="param-type">string</span>




                                            </td>



                                            <td class="description last">

                                                <p>An encoded string.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>stride</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>




                                            </td>



                                            <td class="description last">

                                                <p>编码字符串中点的维度数。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>factor</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>

                                                | undefined


                                            </td>



                                            <td class="description last">

                                                <p>结果数字将被除以的因子。默认值为<code>1e5</code>.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                一个n维点的列表。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".decodeFloats">
                                    </div>
                                    <h4 class="name">
                                        decodeFloats<span class="signature">(encoded, <span
                                                class="optional">factor</span>)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{Array.&lt;number>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/format/Polyline.js">format/Polyline.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/format/Polyline.js#L252">line
                                            252</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {decodeFloats} from 'ol/format/Polyline';</code></pre>



                                <div class="description">
                                    <p>从编码字符串中解码一个浮点数列表</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>encoded</code></td>



                                            <td class="type">


                                                <span class="param-type">string</span>




                                            </td>



                                            <td class="description last">

                                                <p>An encoded string.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>factor</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>

                                                | undefined


                                            </td>



                                            <td class="description last">

                                                <p>结果将被除以的因子。默认值为 <code>1e5</code>.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                一个浮点数列表。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".encodeDeltas">
                                    </div>
                                    <h4 class="name">
                                        encodeDeltas<span class="signature">(numbers, stride, <span
                                                class="optional">factor</span>)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{string}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/format/Polyline.js">format/Polyline.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/format/Polyline.js#L166">line
                                            166</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {encodeDeltas} from 'ol/format/Polyline';</code></pre>



                                <div class="description">
                                    <p>编码一个n维点列表并返回一个编码字符串</p>
                                    <p>注意：此函数将修改传入的数组！</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>numbers</code></td>



                                            <td class="type">


                                                <span class="param-type">Array.&lt;number></span>




                                            </td>



                                            <td class="description last">

                                                <p>一个n维点的列表。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>stride</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>




                                            </td>



                                            <td class="description last">

                                                <p>列表中点的维度数。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>factor</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>

                                                | undefined


                                            </td>



                                            <td class="description last">

                                                <p>数字将被乘以的因子。剩余的小数位数将被舍去。默认值为<code>1e5</code>.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                The encoded string.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".encodeFloats">
                                    </div>
                                    <h4 class="name">
                                        encodeFloats<span class="signature">(numbers, <span
                                                class="optional">factor</span>)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{string}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/format/Polyline.js">format/Polyline.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/format/Polyline.js#L234">line
                                            234</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {encodeFloats} from 'ol/format/Polyline';</code></pre>



                                <div class="description">
                                    <p>编码一个浮点数列表并返回一个编码字符串</p>
                                    <p>注意：此函数将修改传入的数组！</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>numbers</code></td>



                                            <td class="type">


                                                <span class="param-type">Array.&lt;number></span>




                                            </td>



                                            <td class="description last">

                                                <p>一个浮点数列表。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>factor</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>

                                                | undefined


                                            </td>



                                            <td class="description last">

                                                <p>数字将被乘以的因子。剩余的小数位数将被舍去。默认值为<code>1e5</code>.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                The encoded string.
                                <br />




                            </dd>

                        </dl>



                        <h3 class="subsection-title">Type Definitions</h3>

                        <dl>

                            <dt class="">
                                <div class="nameContainer">
                                    <div class="anchor" id="~Options">
                                    </div>
                                    <h4 class="name">
                                        Options<span class="type-signature type object">{Object}</span>


                                    </h4>
                                </div>

                            </dt>
                            <dd class="">



                                <dl class="details">


                                    <h5 class="subsection-title">Properties:</h5>

                                    <dl>

                                        <table class="props">
                                            <thead>
                                                <tr>

                                                    <th>Name</th>


                                                    <th>Type</th>

                                                    <th class="last">Description</th>
                                                </tr>
                                            </thead>

                                            <tbody>


                                                <tr>

                                                    <td class="name"><code>factor</code></td>


                                                    <td class="type">


                                                        <span class="param-type">number</span>



                                                        <br>(defaults to 1e5)


                                                    </td>

                                                    <td class="description last">
                                                        <p>坐标值将被缩放的因子。
                                                        </p>

                                                    </td>
                                                </tr>



                                                <tr>

                                                    <td class="name"><code>geometryLayout</code></td>


                                                    <td class="type">


                                                        <span class="param-type"><a
                                                                href="module-ol_geom_Geometry.html#~GeometryLayout">GeometryLayout</a></span>



                                                        <br>(defaults to 'XY')


                                                    </td>

                                                    <td class="description last">
                                                        <p>由格式读取器创建的特征几何图形的布局。</p>

                                                    </td>
                                                </tr>


                                            </tbody>
                                        </table>
                                    </dl>






















                                </dl>



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